a.

1. 扩张的；膨胀的
2. 广阔的；辽阔的；广泛的
   an expansive view of the surrounding area

   周围地区的辽阔景色

3. 坦率的；豪爽的；健谈的
   Today Sarah became jovial and expansive.

   今天萨拉变得快活而健谈。

adj.

1. covering a wide area; extensive.
2. relaxed, genial, and communicative.
3. tending towards economic or political expansion.